DE60322958D1 - SYSTEM FOR THE SECURE ENCRYPTION OF AN AUDIOSTROM - Google Patents

SYSTEM FOR THE SECURE ENCRYPTION OF AN AUDIOSTROM

Info

Publication number
DE60322958D1
DE60322958D1 DE60322958T DE60322958T DE60322958D1 DE 60322958 D1 DE60322958 D1 DE 60322958D1 DE 60322958 T DE60322958 T DE 60322958T DE 60322958 T DE60322958 T DE 60322958T DE 60322958 D1 DE60322958 D1 DE 60322958D1
Authority
DE
Germany
Prior art keywords
stream
main stream
nominal
frames
complementary
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
DE60322958T
Other languages
German (de)
Inventor
Daniel Lecomte
Daniela Parayre-Mitzova
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
OL Security LLC
Original Assignee
Medialive SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Medialive SA filed Critical Medialive SA
Application granted granted Critical
Publication of DE60322958D1 publication Critical patent/DE60322958D1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/233—Processing of audio elementary streams
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K1/00—Secret communication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/439—Processing of audio elementary streams
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/45—Management operations performed by the client for facilitating the reception of or the interaction with the content or administrating data related to the end-user or to the client device itself, e.g. learning user preferences for recommending movies, resolving scheduling conflicts
    • H04N21/462—Content or additional data management, e.g. creating a master electronic program guide from data received from the Internet and a Head-end, controlling the complexity of a video stream by scaling the resolution or bit-rate based on the client capabilities
    • H04N21/4622—Retrieving content or additional data from different sources, e.g. from a broadcast channel and the Internet
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
    • H04N21/81—Monomedia components thereof
    • H04N21/8106—Monomedia components thereof involving special audio data, e.g. different tracks for different languages
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
    • H04N21/83—Generation or processing of protective or descriptive data associated with content; Content structuring
    • H04N21/835—Generation of protective data, e.g. certificates

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Databases & Information Systems (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Acoustics & Sound (AREA)
  • Computational Linguistics (AREA)
  • Health & Medical Sciences (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • Computer Security & Cryptography (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Stereophonic System (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Storage Device Security (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Circuit For Audible Band Transducer (AREA)

Abstract

The invention relates to a method of distributing digital audio sequences according to a nominal stream format consisting of a series of frames. Each of said frames comprises a digital block containing a certain number of coefficients corresponding to simple audio elements which are digitally encoded according to a mode identified in the relevant stream and used by all of the audio decoders capable of doing so, such that the stream can be decoded correctly. The invention is characterised in that it comprises: a preparatory step consisting in modifying at least one of the aforementioned coefficients; and a transmission step involving the transmission of (i) a main stream with the nominal format, which is made up of the blocks modified during the preparatory step, and (ii), using a channel separate from said main stream, complementary digital information which enables the original stream to be reconstructed from the calculation on the recipient device according to the main stream and the complementary information. The invention also relates to a system and a piece of equipment which are used to implement the inventive method.
DE60322958T 2002-10-03 2003-10-03 SYSTEM FOR THE SECURE ENCRYPTION OF AN AUDIOSTROM Expired - Lifetime DE60322958D1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0212267A FR2845543B1 (en) 2002-10-03 2002-10-03 SECURE AUDIO STREAMING SYSTEM
PCT/FR2003/002913 WO2004032418A2 (en) 2002-10-03 2003-10-03 Secure audio stream scrambling system

Publications (1)

Publication Number Publication Date
DE60322958D1 true DE60322958D1 (en) 2008-09-25

Family

ID=32011371

Family Applications (1)

Application Number Title Priority Date Filing Date
DE60322958T Expired - Lifetime DE60322958D1 (en) 2002-10-03 2003-10-03 SYSTEM FOR THE SECURE ENCRYPTION OF AN AUDIOSTROM

Country Status (6)

Country Link
EP (1) EP1582022B1 (en)
AT (1) ATE405049T1 (en)
AU (1) AU2003299159A1 (en)
DE (1) DE60322958D1 (en)
FR (1) FR2845543B1 (en)
WO (1) WO2004032418A2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005103906A1 (en) * 2004-04-20 2005-11-03 Matsushita Electric Industrial Co., Ltd. Recorder/reproducer and content data protection system
FR2898451B1 (en) 2006-03-13 2008-05-09 Medialive METHOD AND EQUIPMENT FOR DISTRIBUTING DIGITAL AUDIOVISUAL CONTENT SECURED BY INTEROPERABLE SOLUTIONS

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5058159A (en) * 1989-06-15 1991-10-15 Macrovision Corporation Method and system for scrambling and descrambling audio information signals
JP2002512494A (en) * 1998-04-21 2002-04-23 ソラナ・テクノロジー・ディベロップメント・コーポレイション Multimedia adaptive scrambling system
DE19907964C1 (en) * 1999-02-24 2000-08-10 Fraunhofer Ges Forschung Encryption device for audio and/or video signals uses coder providing data stream with pre-determined syntax and encryption stage altering useful data in data stream without altering syntax
ATE270798T1 (en) * 2000-12-15 2004-07-15 Dolby Lab Licensing Corp PARTIAL ENCRYPTION OF COMPOSITE BITREAMS
EP1382202B1 (en) * 2001-04-18 2006-07-26 Koninklijke Philips Electronics N.V. Audio coding with partial encryption

Also Published As

Publication number Publication date
AU2003299159A1 (en) 2004-04-23
ATE405049T1 (en) 2008-08-15
EP1582022A2 (en) 2005-10-05
FR2845543B1 (en) 2005-02-04
FR2845543A1 (en) 2004-04-09
WO2004032418A3 (en) 2004-08-05
WO2004032418A2 (en) 2004-04-15
AU2003299159A8 (en) 2004-04-23
EP1582022B1 (en) 2008-08-13

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Legal Events

Date Code Title Description
8327 Change in the person/name/address of the patent owner

Owner name: QUERELL DATA LLC, DOVER, DEL., US

8328 Change in the person/name/address of the agent

Representative=s name: GRUENECKER, KINKELDEY, STOCKMAIR & SCHWANHAEUSSER,

8364 No opposition during term of opposition